1165556160 has 168 divisors, whose sum is σ = 4049731296. Its totient is φ = 307660800.

The previous prime is 1165556153. The next prime is 1165556191. The reversal of 1165556160 is 616555611.

It is a super-2 number, since 2×1165556160² = 2717042324227891200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288877 + ... + 292883.

Almost surely, 2^1165556160 is an apocalyptic number.

1165556160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165556160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2024865648).

1165556160 is an abundant number, since it is smaller than the sum of its proper divisors (2884175136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165556160 is a wasteful number, since it uses less digits than its factorization.

1165556160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4131 (or 4118 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1165556160 is about 34140.2425298942. The cubic root of 1165556160 is about 1052.3924764575.

The spelling of 1165556160 in words is "one billion, one hundred sixty-five million, five hundred fifty-six thousand, one hundred sixty".